JPH08267647A - Graphite-clad structural material and graphite part using it - Google Patents

Abstract

PURPOSE: To provide a graphite-clad sheet with excellent mechanical strength and being usable in a wide range of applications and to provide a graphite part. CONSTITUTION: A graphite-clad sheet 10 is provided with a highly oriented and flexible thin graphite film 11 and a substrate sheet 12 fixed on one face of the graphite film 11 and if necessary, the fixing member and the substrate sheet are connected with an adhesive filled in a through-hole of the graphite film, which is placed between both parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphite produced by firing a polymer film, having high orientation and flexibility of graphite crystals along the plane direction and having excellent thermal conductivity in the plane direction. The present invention relates to a clad structure material for a sheet member and a graphite component using the same.

[0002]

2. Description of the Related Art Graphite occupies an important position as an industrial material for providing useful properties such as excellent heat resistance, chemical resistance, and high electrical conductivity, and secondary battery electrode material, heating element,
Widely used as structural materials, gaskets, heat-resistant sealing materials, etc. In particular, a graphite sheet obtained by heat-treating a film of a specific polymer compound in an inert gas at a temperature of 2400 ° C. or higher, and rolling it if necessary, produces a uniform foaming state by high-temperature heat treatment, It was found that a flexible graphite sheet having flexibility and elasticity can be obtained by rolling this, and in this graphite sheet, the orientation directions of the graphite crystals are aligned in the plane direction (high orientation It is known that not only the thermal conductivity in the surface direction is not easily influenced by the sheet thickness but also excellent, and a material that is light and has excellent heat resistance can be provided (Japanese Patent Laid-Open No. 3-30023). 7
No. 5211, JP-A-4-21508).

[0003]

However, when the conventional flexible graphite is used for the above-mentioned applications, the mechanical strength may be insufficient due to its flexibility. On the other hand,
The graphite sheet having a high orientation disclosed in Japanese Patent Publication No. 1-51442 is obtained by press-baking a film of a specific polymer compound and has excellent mechanical strength, but the graphite sheet has flexibility. Since it does not have it, a graphite member having an arbitrary shape cannot be obtained, the application range is limited, and it cannot be used for a wide range of applications.

Therefore, an object of the present invention is to provide a graphite clad structural material which is excellent in mechanical strength and can be used in a wide variety of applications. Another object of the present invention is to provide a graphite component using the above graphite clad structural material.

[0005]

The graphite clad structural material according to the present invention is manufactured by firing a polymer film, has high orientation in the plane direction and is flexible, and particularly has a rocking characteristic of 20. A graphite clad structural material in which at least one graphite sheet member having excellent thermal conductivity in the plane direction and at least one supporting member spreading on at least one side of the graphite sheet member are fixedly laminated. is there.

The graphite clad structural material according to the present invention includes a graphite sheet member on one side or both sides of a supporting member, or a glad structural material in which supporting members are laminated and fixed on both sides of the graphite sheet member. As a specific polymer compound, various polyoxadiazole (POD), polybenzothiazole (PBT), polybenzobisthiazole (PBBT), polybenzoxazole (PB)
O), polybenzobisoxazole (PBBO), various polyimides (PI), various polyamides (PA), polyphenylenebenzimidazole (PBI), polyphenylenebenzobisimidazole (PPBI), polythiazole (PT), polyparaphenylenevinylene (PPV) At least one selected from the group consisting of) can be used.

As the above-mentioned various polyoxadiazoles,
There are polyparaphenylene-1,3,4-oxadiazoles and their isomers. The various polyimides mentioned above include aromatic polyimides represented by the following general formula (1).

[0008]

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[0009]

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[0010]

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The above various polyamides have the following general formula (2):
There is an aromatic polyamide represented by

[0012]

[Chemical 4]

The heat treatment condition for graphitizing the polymer compound film is 2400 ° C. or higher, preferably 300.
It is preferable to perform heat treatment so as to reach a temperature range around 0 ° C. This is because it is possible to manufacture a film having a higher orientation. When the maximum temperature is less than 2000 ° C., the obtained graphite tends to be hard and brittle. The heat treatment is usually performed in an inert gas. The pressure during firing may be normal pressure. After the heat treatment, a rolling process may be further performed if necessary.

The film thickness of the polymer compound is preferably in the range of 5 μm to 200 μm in order to suppress the influence of the gas generated during the graphitization during the heat treatment. This is because if the thickness of the raw material film exceeds 200 μm, the gas is generated from the inside of the film during the heat treatment process, and the film is in a tattered state, and it is difficult to use it alone as a high quality material.

It is preferable to add an inorganic or organic filler to the polymer film. The role of the filler is to bring the film after heat treatment into a state of uniform foaming. That is, the added filler generates a gas during heating, and the cavity after the gas is generated serves as a passage to help the mild passage of the decomposition gas from the inside of the film. The filler thus serves to create a homogeneous foam.

Titanium oxide or calcium hydrogen phosphate, if necessary in combination with a phosphoric ester, is preferably added in an amount of 0.2 to 20% by weight, more preferably 1 to 10% by weight. is there. The optimum addition amount depends on the thickness of the polymer compound, and when the polymer compound is thin, the addition amount is preferably large, and when it is thick, the addition amount may be small.

As the filler used for this purpose,
Examples include phosphoric acid ester-based, calcium phosphate-based, polyester-based, epoxy-based, stearic acid-based, trimetic acid-based, metal oxide-based, organotin-based, lead-based, azo-based, nitroso-based, and sulfonylhydrazide-based compounds. . In particular, the aromatic polyimide represented by the general formula (1) in the polymer compound, in which R1 is an aromatic hydrocarbon, is used, and titanium oxide or calcium hydrogen phosphate is required as the filler. If used in combination with a phosphoric acid ester, 0.2 to 20% by weight, preferably 1 to 10%
A film having a thickness of 5 to 200 μm was formed by blending in an amount of 5% by weight, and the film manufactured under the above heat treatment conditions has a rocking characteristic of a graphite sheet member of 2
It has a specific gravity in the range of 0.5 to 1.5 at 0 degrees or less and a thermal conductivity of 860 kcal / m · h · ° C in the AB plane direction (Cu of 2.5
Times, that is, 4.4 times that of Al), the electric conductivity in the AB plane direction is 250,000 S / cm, and the elastic modulus in the AB plane direction is 84,30.
It was shown to be 0 kgf / mm ² . The rocking characteristics measured here are the rotor flex RU-2 manufactured by Rigaku Denki Co., Ltd.
Using a 00B type X-ray diffractometer, graphite (000
2) refers to the rocking characteristic at the peak position.

The obtained graphite sheet shows cleavage and has insufficient mechanical strength and moldability by itself. Therefore, the clad material is formed by reinforcing the support member, but when the clad material of the present invention is used as a heat exchange member, the support member is preferably a metal sheet,
It may be composed of a metal lath plate having irregularities or a metal perforated plate in which the periphery of the hole is projected on one surface.

When the clad material of the present invention is used for other purposes, the supporting member may be made of ceramic, synthetic resin, cloth or paper. The clad material of the present invention has a plurality of pores formed in the fixing portion before firing the polymer film or after forming the graphite sheet member in order to enhance the adhesion between the supporting member and the graphite sheet member, It is preferable that the graphite sheet member is sandwiched between the fixing member and the fixing plate provided on the surface opposite to the supporting member and having a certain area.

In order not to impede the thermal conductivity in the plane direction of the graphite sheet member, the adhesive should be selected according to the material of the supporting member, and in the case of a metallic supporting member, It is good to choose a conductive paste.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION

Production Example 25 μm-thick polypyromellitimide (Kapton H film manufactured by Dyupon) containing 5% by weight of calcium hydrogen phosphate in nitrogen gas using an LTF-S type electric furnace manufactured by Sankyo Denki Kogyo Co., Ltd. The temperature was raised to 1000 ° C. at a rate of 3 ° C./min, and the temperature was kept at 1000 ° C. for 1 hour for preliminary heat treatment. Next, the obtained carbonized sheet was set inside a graphite cylinder so that it could be freely expanded and contracted, and an ultrahigh temperature furnace type 46-5 manufactured by Shinsei Denki Co., Ltd. was used together with the graphite cylinder at 5 ° C / m.
Heated to 2800 ° C. at a rate of in. The heating was carried out at normal pressure in an argon atmosphere. The obtained sheet was passed through two rollers made of stainless steel (manufactured by Kumagai Riki Kogyo Co., Ltd.) for rolling treatment. A sheet having a tensile strength of 630 Kgf / cm ^{2 and} a thermal conductivity of 860 kcal / m · h · ° C was obtained.

Example 1 FIG. 1 is an exploded perspective view showing a graphite clad sheet of the present invention, and FIG. 2 is an enlarged sectional view thereof. In the figure, a graphite clad sheet 10 has a structure in which a lath plate (an example of a support member) 12 made of aluminum is laminated on a flexible graphite film 11 having flexibility. As this graphite film 11, the one produced in Production Example 1 is used. In the graphite film 11, the graphite crystals are oriented in the plane direction, and the rocking property has a high orientation of 20 degrees or less. Lath plate 12 is a grid 1
3, the grid 13 is folded and formed in a concavo-convex shape in a direction intersecting the plane. The lath plate 12 is fixed to the graphite film 11 by causing the protrusions of the lattice 13 to dig into the graphite film 11 by almost half.

The graphite clad sheet 10 is shown in FIG.
As shown in FIG.
It is manufactured by stacking two and rolling them with a roll press 15. In this way, by fixing the lath plate 12 to the flexible graphite film 11, the graphite film 11 can be reinforced and the graphite clad sheet 10
The mechanical strength of can be improved. Further, the flexible graphite sheet can be formed into an arbitrary shape along the shape of the support sheet member.

Further, not only the half of the lath plate 12 but also the graphite film 11 is entirely cut to break the crystal structure of the graphite film 11, whereby the heat transfer coefficient can be changed in the thickness direction of the graphite clad sheet 10. . That is, the crystal structure is cut off by the lattices 13 of the lath plate 12 in the portion where the lath plate 12 of the graphite clad sheet 10 bites, so that it becomes difficult to transfer heat. On the other hand, in the portion where the lath plate 12 does not bite, the original performance of highly oriented graphite can be exhibited, and heat can be transferred with high efficiency.

Also, by making the lath plate 12 bite,
Various sheets and films can be fixed by using the lath plate 12 as an anchor. For example, a thin film ceramic or metal film is fixed by using the lath plate 12 as an anchor by various film forming methods such as a sputtering method and a plating method, or a semi-curing type (B
(Stage) Epoxy prepreg can be fixed by using the lath plate 12 as an anchor, and further a ceramic or synthetic resin sheet can be adhered. In this way, the graphite clad sheet 10 to which the lath plate 12 is fixed can also improve the fixing performance to various sheets and films.

Furthermore, if a lath plate made of metal (for example, iron) having a magnetic shield effect such as iron is used, a graphite clad sheet excellent in heat conductivity and magnetic shield effect can be obtained. Example 2 Instead of the graphite clad sheet 10 having a structure in which a lath plate 12 is fixed to one surface of a graphite film 11, as shown in FIG. 4, a graphite clad sheet 10a having a structure in which a lath plate 12 is fixed to both surfaces of a graphite film 11 is used. But it's okay. This graphite clad sheet 10
In a, since both surfaces of the graphite film 11 are covered with the lath plates 12, various films and sheets can be fixed to both surfaces. The fixing method may be the same as in the first embodiment.

Embodiment 3 As shown in FIG. 5, a graphite clad sheet 10b having a structure in which graphite films 11 are fixed on both sides of a lath plate 12 may be used. In Example 3, since both surfaces are covered with the graphite film 11, the fixing performance with other sheets or films is inferior to the two examples described above, but the heat transfer property can be improved.

Embodiment 4 As shown in FIG. 6, a graphite clad sheet 10c having a structure in which a punching plate 14 made of aluminum is fixed on a graphite film 11 may be used. Punching board 1
4, round holes 16 are formed vertically and horizontally. As shown in FIG. 7, the peripheral portion of the round hole 16 has a protruding portion 17 protruding downward.
Are formed. By punching the protrusion 17 into the graphite film 11, the punching plate 14 and the graphite film 11 are fixed to each other. Such a graphite clad sheet 10c has the same effect as when the lath plate 12 is fixed, can improve the fixing performance with various sheets and films, and has a round hole 1
Since 6 can be used as a through hole, it is also suitable as a heat dissipation board used for a printed wiring board.

Example 5 As shown in FIG. 8, 200 pieces of 25 μm aromatic polyimide film (Kapton H film manufactured by Dyupon Co., Ltd.) were laminated to prepare a film laminated body 21, and fixation was required using a laser. A plurality of holes 23 are machined in various places. This laminated body 21 is fired and rolled in the same manner as in Production Example 1 to form a graphite sheet 22. Adhesive 24 in the hole
The support sheet member 25 on the upper surface of the graphite sheet 22 and the fixing member 26 on the lower surface where the holes are formed, and the support sheet member 2 is pressed while pressing from above and below.
5 and the fixing member 26 are joined with the adhesive 24, and the graphite sheet 22 is sandwiched.

The supporting sheet member 25 and the fixing member 2
Since 6 is usually manufactured from the same material, when both of the above are made of metal as the above-mentioned adhesive, they are joined using a metal joining paste such as solder, platinum, or indium to provide conductivity in the plane direction of the graphite sheet. It is possible to firmly bond without impairing the thermal conductivity. When both of them are made of resin, it is preferable to firmly bond them by using a conductive adhesive or a heat conductive paste. Further, when both of them are ceramics, it is possible to firmly bond them by using a sintering paste of the same powder material.

Embodiment 6 As shown in FIG. 9, a graphite clad sheet 10d having a structure in which a synthetic resin plate 18 made of acrylic resin, styrene resin, epoxy resin, synthetic rubber or the like is fixed to both surfaces of a graphite film 11 may be used. As a fixing method,
An epoxy prepreg bonding method or an insert molding bonding method may be used. The graphite clad sheet 10d has a large difference in heat transfer coefficient between graphite and synthetic resin.
It is possible to provide materials having greatly different heat transfer characteristics on the front and back sides of d. Note that, instead of the synthetic resin plate 18, a ceramic plate or paper may be fixed to the graphite film 11 to obtain the same effect.

Embodiment 7 FIG. 11 is a sectional view showing a heat-retaining box 30 employing a graphite part according to Embodiment 7 of the present invention. Insulation box 30
Is a heat-retaining body 31 with an open upper surface, and a heat-retaining body 31
And an upper door 32 for opening and closing. A packing 40, which comes into contact with the upper door 32, is attached to the opening of the heat-retaining cabinet body 31. The heat insulation main body 31 is a box-shaped heat insulating case 33 made of Styrofoam with an open top surface.
And a graphite film 34 fixed to the inside of the heat insulating case 33, and an outer case 35 made of vinyl chloride coated steel plate bonded to the outside of the heat insulating case 33. The upper door 32 is attached to the warm box main body 31 by a hinge 36 so as to be openable and closable at the upper end. The upper door 32 includes a styrofoam plate-shaped heat insulating member 37, a graphite film 38 fixed to the inside of the heat insulating member 37, and an outer member 39 made of vinyl chloride coated steel plate adhered to the outside of the heat insulating member 37. Have The heat insulating case 33 and the graphite film 34, and the heat insulating member 37 and the graphite film 38 respectively form a graphite clad structure.

In the heat-retaining box 30 having such a structure, the graphite film is arranged inside, the temperature inside the heat-retaining box is likely to be uniform, and the heat is sealed, so that the heat inside escapes to the outside. It gets harder. Example 8 FIG. 11 is a side view showing a heat sink as a graphite component according to Example 8 of the present invention.

The heat sink 50 is arranged in contact with a semiconductor such as a CPU or a power transistor. The heat sink 50 has a shape in which the graphite clad sheet 10 having the lath plate 12 fixed to the graphite film 11 shown in FIG. The heat sink 50 can be easily manufactured simply by bending the graphite clad sheet 10.

Embodiment 9 FIG. 12 is a side view showing a flexible printed wiring board using a graphite component according to Embodiment 9 of the present invention. The printed wiring board 60 is an S-shaped curved substrate, and has a flexible resin substrate 61 made of, for example, a polyimide resin, and a heat dissipation substrate 62 using the graphite clad sheet 10c shown in FIG. There is. Various electronic components 63 such as an LSI are mounted on the printed wiring board 60 by pins, for example. The resin substrate 61 is shown in FIG.
As shown in FIG. 7, the punching plate 14 of the heat dissipation substrate 62 is bonded by the B-stage epoxy prepreg 64. Through holes 66 for inserting the wiring pins 65 of the electronic component 63 are formed in the round holes 16 of the punching plate 14. A wiring pattern is formed on the lower surface of the resin substrate 61 in FIG. 13, and wiring pins 65 are soldered to the lands.

Embodiment 10 FIG. 14 is a sectional view of a tuner part adopting a graphite part according to a tenth embodiment of the present invention. The tuner component 70 includes a printed circuit board 71, an electronic component 74 including an MCM 72 and a sealed small circuit 73 mounted on the printed circuit board 71, and a case 75. The case 75 serves to magnetically shield the electronic component 74 and to radiate heat generated from the electronic component 74. The case 75 is formed by bending the graphite clad sheet 10 having the lath plate 12 fixed to the graphite film 11 shown in FIG. It is formed by molding. Here, since the electronic component 74 is covered with the case 75 adopting the graphite clad structure and magnetically shielded, it is difficult for the electronic component 74 to be affected by magnetism from the outside, and the electronic component 74 is not affected.
The generated magnetism is unlikely to leak to the outside.

Example 11 FIGS. 15 and 16 show a heating / cooling sheet using a graphite part according to Example 11 of the present invention. The heating / cooling sheet 80 is a flexible resin sheet 82 having four U-shaped graphite sheets 81 and four comb tooth-shaped protrusions 82a to which the graphite sheet 81 is fixed.
It consists of and. The graphite sheets 81 are connected in series, and a heater circuit 83 is connected to both ends thereof. When a 12V DC voltage is applied to the graphite sheet 81 via the heater circuit 83, it becomes a heater. Alternatively, cooling can also be performed by placing the Helche element 84 in contact with the end of the graphite sheet 81. Such a heating / cooling sheet 80 is suitable for use as a sleep pillow or a vehicle seat. Since the graphite sheet 81 has good heat dissipation, it can be cooled by natural cooling without disposing the Peltier element 84.

Embodiment 12 FIG. 17 is a perspective view showing a heat exchanger as a heat radiation structure according to an embodiment of the present invention. In the figure, the heat exchanger 1
00 is a bent copper pipe 102 and a copper pipe 1
And a heat radiation fin 103 that is in contact with each other. The copper pipe 102 allows a fluid such as heating steam or cooling water to pass therethrough, and is formed by bending the hairpin into a zigzag shape. The radiating fins 3 are clad structural materials of graphite sheets having a high orientation in the plane direction manufactured in Example 1, and are arranged side by side so that the main surfaces face each other in the axial direction of the copper pipe 102.

As shown in FIG. 18A, a through hole 105 is formed in the radiating fin 103 through the copper pipe 102. Slits 104 that extend radially are formed around the through hole 105. The inner diameter of the through hole 105 is slightly smaller than the outer diameter of the copper pipe 102. Here, through hole 1
By making the inner diameter of 05 smaller than the outer diameter of the copper pipe 102, when the copper pipe 102 is inserted into the radiation fin 103, the radiation fin 103 and the surface of the copper pipe 102 are surely brought into contact with each other. Further, without inserting a steel ball or the like into the copper pipe 102, the radiation fin 103 and the copper pipe 102 can be reliably brought into contact with each other by a simple insertion work.

In this heat exchanger 100, when a fluid such as heating steam or a cooling liquid passes through the copper pipe 102, heat is transferred to the heat radiation fins 103 and radiated to the atmosphere to be heat-exchanged to cool or cool the fluid. Be heated. Here, since the radiation fin 103 is made of a graphite sheet having high orientation, the heat transfer property is higher than that of aluminum, and the heat exchanger 100 can be made smaller and lighter. Further, since the radiation fin is reinforced by the lath plate 12, the mechanical strength of the radiation fin 103 is improved.

Next, the manufacturing procedure of the heat exchanger 100 will be described. Here, FIG. 19 is a schematic view showing a manufacturing procedure of the heat exchanger shown in FIG. 17, in which a state before attaching the U vent to the open end portion of the copper pipe (a) and a state after attaching the U vent (b).
Indicates. First, a straight copper pipe 102a, a hairpin-shaped copper pipe 102b, a hairpin-shaped copper pipe 102c whose other end extends, a U bend 102d, and a radiation fin 1
03 and prepare. Then, the radiation fins 103 are arranged side by side so that the main surfaces thereof face each other, and the copper pipes 102a to 10a are arranged.
2c are inserted into the through holes 105 of the heat radiation fins 103, respectively. As a result, as shown in FIG. 19A, the copper pipe 1
02a to 102c are arranged above and below, and the radiation fin 103
Are arranged side by side in the axial direction of the copper pipes 102a to 102c.

In this embodiment, since the inner diameter of the through hole 105 is smaller than the outer diameter of the copper pipe 102, as shown in FIGS. 103 bends and the copper pipe 102
The heat radiation fin 103 surely contacts the peripheral surface of the. Further, since the radiation fin 103 is bent by the slit 104,
The copper pipe 102 can be easily inserted.

Subsequently, as shown in FIG. 19B, a U bend 102d is adhered to the open ends of the copper pipes 102a to 102c by brazing, for example. As a result, the heat exchanger 100 shown in FIG. 17 is completed. Here, since graphite having high orientation is used for the radiating fins 103, heat transfer is enhanced, and the heat exchanger can be made smaller, lighter and more efficient. In addition, the radiation fin 103
Since it is not necessary to perform a complicated process such as a process of inserting a steel ball to bring the steel pipe into contact with the copper pipe 102, the heat exchanger 100 can be easily manufactured as compared with the conventional example in which the steel ball is pushed into the copper pipe 102. it can.

Embodiment 13 FIG. 20 is a perspective view showing a heat exchanger 10 as a heat radiation structure according to Embodiment 13 of the present invention. In the figure, the heat exchanger 110 includes a copper pipe 111 and a radiation fin 112 that is spirally wound around the copper pipe 111. The copper pipe 111 is a member bent in a zigzag shape like a hairpin. The radiation fin 112 is shown in FIG.
As shown in FIG. 21 (a), a strip 113 of the graphite clad sheet having a high orientation produced in Example 1 is attached to a core wire 113 made of a copper wire or a carbon yarn side by side in FIG. As shown in b), it has a structure in which it is spirally wound around the copper pipe 111. As the strip 114, a waste product of a graphite sheet used for other products may be used.

The heat exchanger 110 is manufactured by the following procedure. Here, FIG. 21 is a schematic view showing a manufacturing process of the heat exchanger shown in FIG. 20, and is a plan view (a) showing a state in which the strips are connected in parallel to the core of the radiation fin, and (b) shows the copper. A state in which the pipe is spirally wound is shown. First, the copper pipe 111, the core wire 113, and the graphite sheet strip 1
21 and the strip 114 on the core wire 113 as shown in FIG.
As shown in (a), the radiation fins 112 are obtained by bonding.
Subsequently, as shown in FIG. 21B, the obtained heat radiation fins 112 are spirally wound around and adhered to the periphery of the copper pipe 111. Finally, the copper pipe 111 around which the heat radiation fin 112 is wound is bent in a zigzag shape like a hairpin by a pipe bender.

In such a heat exchanger 110, the surface area of the radiation fins 112 can be further increased. As a result, it is possible to further reduce the size, the weight, and the efficiency. Example 14 FIG. 22 is a perspective view showing a heating device 120 employing a graphite component according to Example 14 of the present invention.

The heating device 120 is a rod-shaped sheathed heater 1.
21 and a heat radiating plate 122 arranged side by side in the longitudinal direction of the heater 121. The heat dissipation plate 22 is a rectangular plate-shaped member, and for example, the graphite clad sheet 10 in which the graphite films 11 having high orientation are fixed to both surfaces of the lath plate 12 having the same shape as that shown in FIG.
b is used. The lath plate 12 is preferably made of nickel chrome, which has excellent heat resistance. A through hole 1123 is formed in the center of the heat dissipation plate 122. The inner diameter of the through hole 123 is equal to the heater 121.
Is approximately equal to the outer diameter of.

Such a heating device 120 has a through hole 123.
It is manufactured by arranging the heat radiating plates 122 on which the heaters are formed side by side around the heater 121. In this heating device 120, since the heat dissipation plate 120 is provided around the heater 121, the heat from the heater 121 is dissipated from the heater 121 itself and the heat dissipation plate 122. As a result, the heat radiation area is widened, and the heat can be widely radiated.

Fifteenth Embodiment FIG. 23 is a perspective view showing a heating device 130 as a heat radiation structure according to a fifteenth embodiment. The heating device 130 has a heater 131 and a heat radiating plate 132 that is arranged on the back side of the heater 131 in a curved manner. The heat radiating plate 132 is made of highly oriented graphite and is formed, for example, in a curved shape by drawing a parabolic surface.

In such a heating device 130, the heater 1
The heat radiated from 31 is absorbed by the heat dissipation plate 132 and radiated to the front side of the heater 131, for example. As a result,
The heat radiated to the back surface of the heater 131 is also efficiently radiated to the front surface, the heat generated from the heater 131 can be transmitted in one direction, and the heat can be efficiently radiated to the object to be heated.

Sixteenth Embodiment FIG. 24 is a perspective view showing a heating device 140 as a heat radiation structure according to a sixteenth embodiment. The heating device 140 includes a heater 141 and two heat radiating plates 142 made of graphite sheets that are attached so as to extend vertically from the peripheral surface of the heater 141. The heat dissipation plate 142 is a heater 141.
Is long in the axial direction, contacts the heater 141, and extends radially in the vertical direction.

Here, the heat generated by the heater 141 is
The heat is transmitted to the heat radiating plate 142 and radiated back and forth from the main surface of the heat radiating plate 142. As a result, the heat dissipation area can be widened and the heat can be widely dissipated. The number of heat sinks may be any, and for example, as shown in FIG.
42 may be attached to each other so as to extend radially around the heater 141. In this case, the heat radiation area is further increased, and the heat can be radiated more widely.

Example 17 In FIG. 26, the above-mentioned flexible highly-oriented graphite sheet G is placed on the surface of the seat back 151 and the seat cushion 152 of the car seat 150 by sandwiching it with the skin material 153 and the cushion material 154. A Peltier element 155 is provided in the above to heat and cool. A temperature sensor 156 is provided near the Peltier element 155.
Is provided to control the heating / cooling temperature. It is preferable to provide a radiation fin 157 on the back side of the Peltier element 155 in order to perform cooling efficiently.

Example 18 FIG. 27 is a sectional perspective view of a thermal diffusion sheet unit, in which a belt-shaped highly oriented graphite sheet G is a polymer protective sheet 16
It is accommodated in a pocket portion 161 formed between 0, so that it can cope with the deformation curvature of the human body, and its end portion is connected to a Peltier element 162 provided on the upper portion.

FIG. 28 is a detailed view of the components showing the positional relationship with the Peltier device when the thermal diffusion sheet unit of FIG. 27 is attached to the car seat. Conventionally, US Pat.
In No. 136, 577, heating and heating of a car seat is performed through a metal plate such as copper, but in the present invention, since a highly oriented graphite sheet is used, the heat capacity is 1/4 times that of copper. Since the thermal conductivity is twice or more, the heating and heating rises five times or more, and quick heating and efficient heating can be performed.

EXAMPLE 19 FIG. 29 shows a pillow 17 having a cylindrical shape which can be cooled and heated, which is formed by using the graphite clad structural material according to the present invention (or one surrounded or sandwiched by the polymer protective sheet or the like).
In the sectional view of 0, the graphite sheet G of the present invention is arranged around the upper half on which the head is placed, the Peltier element 171 is connected to the center thereof, and the small fan 172 is provided to diffuse the atmosphere inside the pillow. I am trying.

Example 20 FIG. 30 is a cross-sectional view of a shoe 180 capable of cooling and heating formed by using the graphite clad structural material according to the present invention (or one surrounded or sandwiched by the polymer protective sheet or the like). The graphite sheet G of the present invention is arranged in the shoe, and a pocket 181 is provided on the upper part of the toe to connect with the graphite sheet G so that the entire inside of the shoe can be cooled and heated.

[0058]

The graphite clad structure material according to the present invention comprises a graphite sheet member having high orientation and flexibility, and a supporting member fixed to at least one surface of the graphite member. The graphite sheet having mechanical strength and flexibility can be formed into any shape along the shape of the supporting sheet member. Therefore, it is possible to obtain a graphite clad structural material which has excellent mechanical strength and can be used for a wide range of purposes.

In particular, when the rocking characteristic of the graphite member is 20 degrees or less, the crystal orientation becomes higher and the heat transfer ability is improved. When the support member is made of metal, for example, a magnetic shielding metal such as iron can be used to obtain a magnetic shielding effect, and a metal having a high heat transfer coefficient such as copper or aluminum can be used along the alignment direction. The heat can be efficiently transmitted in the direction, and it can be widely used for radiation of heat from the heating element and cooling of the heating element.

When the support member is composed of a metal lath plate having irregularities, the graphite member can be easily fixed by biting the convex portion of the fixing member. Further, the heat transfer coefficient can be changed in the thickness direction of the graphite member by disconnecting the graphite member in the orientation direction by the lattice of the metal lath plate. Further, various members that are hard to be fixed to graphite can be further fixed by using the metal lath plate in which the convex portion bites as an anchor.

When the support member is formed of a metal perforated plate, the graphite member can be easily fixed by biting the protrusion around the hole of the fixing member. Further, the heat transfer coefficient can be changed in the thickness direction of the graphite member by disconnecting the graphite member in the orientation direction by the protruding portion of the metal perforated plate. Further, the metal perforated plate can be used as an anchor to further fix members that are difficult to fix to various graphites. Furthermore, the holes of the metal perforated plate can be used as through holes of the circuit board.

When the supporting member is a ceramic sheet, the heat transfer coefficient can be changed in the thickness direction by the fixing member and the graphite member. When the support member is made of synthetic resin, the heat transfer coefficient can be changed in the thickness direction by the fixing member and the graphite member, and the graphite clad structure can be formed into a lightweight and arbitrary shape.

When the support member is made of paper, the heat transfer coefficient can be changed in the thickness direction by the fixing member and the graphite member, and the graphite clad structure can be formed lightweight and at low cost. Therefore, the graphite clad structure material according to the present invention is useful as a heat dissipation member of a graphite clad structure having high heat transfer performance, and therefore, for example, a heat dissipation fin of a heating element such as a heater, a heat dissipation fin of a radiator, a heat sink of an electric component, or the like. It is possible to reduce the size and weight of the heat dissipation member.

Further, the graphite clad structure material according to the present invention is used as a heat dissipation board using the graphite clad structure, and heat generated from electric parts mounted on the circuit board can be efficiently transferred. INDUSTRIAL APPLICABILITY The graphite clad structure material according to the present invention is useful as a magnetic shield member using a graphite clad structure and can transfer heat and shield magnetism.

[Brief description of drawings]

FIG. 1 is a perspective view of a graphite clad sheet according to an embodiment of the present invention.

2 is an enlarged cross-sectional view of FIG.

FIG. 3 is a perspective view showing a method for manufacturing a graphite clad sheet.

FIG. 4 is a perspective view of a graphite clad sheet according to Example 2.

FIG. 5 is a perspective view of a graphite clad sheet according to Example 3.

FIG. 6 is a perspective view of a graphite clad structure according to Example 4.

7 is an enlarged cross-sectional view of FIG.

FIG. 8 is a process chart showing a forming process of a graphite clad sheet according to Example 5.

FIG. 9 is a sectional side view of a graphite clad sheet according to Example 6.

FIG. 10 is a sectional view of a heat-retaining box adopting the graphite clad sheet according to the present invention.

FIG. 11 is a partial side view of a heat sink using the graphite clad sheet according to the present invention.

FIG. 12 is a side view of a flexible printed wiring board using a graphite clad sheet according to the present invention.

13 is an enlarged cross-sectional view of FIG.

FIG. 14 is a cross-sectional view of a tuner component adopting the graphite clad sheet according to the present invention.

FIG. 15 is a cross-sectional view of a heating / cooling sheet using a graphite clad sheet according to the present invention.

16 is a plan view of the heating / cooling sheet of FIG.

FIG. 17 is a perspective view of a heat exchanger using the graphite clad sheet according to the present invention.

FIG. 18 is an enlarged view showing a state (a) before and a state (b) after insertion of the copper pipe into the radiation fin.

FIG. 19 is a schematic diagram showing a manufacturing procedure of the heat exchanger shown in FIG.

FIG. 20 is a perspective view of the heat exchanger according to the thirteenth embodiment.

FIG. 21 is a schematic view showing a manufacturing process of the heat exchanger shown in FIG.

FIG. 22 is a perspective view of the heating device according to the fourteenth embodiment.

FIG. 23 is a perspective view of a modification of the heating device shown in the fourteenth embodiment.

FIG. 24 is a perspective view of a heating device according to a fifteenth embodiment.

FIG. 25 is a perspective view of the heating device according to the sixteenth embodiment.

FIG. 26 is a perspective view of the heating device according to the seventeenth embodiment.

FIG. 27 is a perspective view of the heating device according to the eighteenth embodiment.

28 is a partial detailed view of the heating device shown in Example 18. FIG.

FIG. 29 is a sectional view of the heating device shown in Example 19.

FIG. 30 is a sectional view of the heating device shown in Example 20.

[Explanation of symbols]

1 Heat Exchanger 3 Radiating Fins 10, 10a, 10b, 10c, 10d Graphite Clad Sheet 11 Graphite Film 12 Lath Plate 13 Lattice 14 Bunching Plate 16 Round Hole 18 Synthetic Resin Plate 22 Radiator 33 Thermal Insulation Case 34 Graphite Film 61 Resin Substrate 62 Heat dissipation board 101,110 Heat exchanger 102,102a-102c, 111 Copper pipe 103,112 Heat dissipation fin 121,131,141 Heater 122,132,142 Heat dissipation body 150 Graphite composite 151 Graphite sheet 152 Reinforcing member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location F28F 1/12 F28F 21/02 21/02 0380-3K H05B 3/10 Z H05B 3/10 C04B 35 / 54 A (72) Inventor Noboru Izumiya No. 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Kazuhiro Mori No. 1006 Kadoma, Kadoma City, Osaka Prefecture (72) Inventor Naoki Nishiki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Komyoji Daido Kadoma City, Kadoma City, Osaka Prefecture 1006 Matsushita Electric Industrial Co., Ltd. (72) Katsuhiko Yamamoto Kadoma City, Kadoma City, Osaka Prefecture 1006 Matsushita Electric Industrial Co., Ltd.

Claims (18)

[Claims] 1. A graphite sheet member produced by firing a polymer sheet, having a high orientation in the plane direction and having flexibility, and at least one graphite sheet member having excellent thermal conductivity in the plane direction. A graphite clad structural material comprising a graphite sheet member and at least one support member spread on at least one surface, which are fixedly laminated. 2. The graphite clad structural material according to claim 1, wherein the graphite sheet member has a rocking characteristic of 20 degrees or less. 3. The graphite sheet member is 5 to 20.
The graphite clad structural material according to claim 2, which is a lightweight graphite sheet produced by firing an aromatic polyimide film having a thickness of 0 μm, having a benzene ring structure arranged in the plane direction of the sheet, and having a uniformly foamed structure. . 4. The graphite clad structural material according to claim 1, wherein the polymer film contains a filler that imparts releasability to the film in a range of 0.2 to 20% by weight. 5. The graphite clad structural material according to claim 1, wherein the supporting member is a metal sheet. 6. The graphite clad structural material according to claim 5, wherein the support member is composed of a metal lath plate having irregularities or a metal perforated plate having a perimeter protruding on one surface. 7. The graphite clad structural material according to claim 1, wherein the support member is made of ceramic, synthetic resin, cloth or paper. 8. A graphite sheet member manufactured by firing a polymer sheet, which has a high orientation along the plane direction and is flexible, and at least one graphite sheet member having excellent thermal conductivity in the plane direction. At least one support member spreading on at least one surface of the graphite sheet member is filled with a conductive paste filled in a plurality of through holes formed in the surface direction of the graphite sheet, the support member and the graphite A graphite clad structural material comprising a sheet member and a fixing member arranged on the opposite side of the supporting member, which are joined and laminated and fixed. 9. A filler for imparting releasability to a film is contained in the range of 0.2 to 20% by weight, and 5 to 200 μm.
It is manufactured by firing an aromatic polyimide film having a thickness of m, has a highly oriented graphite crystal in which benzene ring structures are arranged in the plane direction, and has a uniformly foamed structure, a specific gravity of 0.5 to 1.5. And a graphite sheet member having a rocking characteristic of 20 degrees or less and flexibility and having excellent thermal conductivity in the plane direction, and at least one sheet spread on at least one surface of the graphite sheet member. And a conductive paste filled in a plurality of through holes formed by laminating the metal support sheet member of, and supporting the support sheet member and the support sheet member of the graphite sheet. A graphite clad structural material for heat exchange, which is formed by joining a sheet member and a fixing member arranged on the opposite side. 10. A graphite component having a heat dissipation member made of the graphite clad structural material according to claim 1. 11. A graphite component having a heat dissipation board using the graphite clad structural material according to claim 1 and a circuit board laminated on the heat dissipation board. 12. A graphite component having a magnetic shield member using the graphite clad structural material according to claim 1. 13. A flexible, highly-oriented graphite sheet is disposed by being sandwiched between a skin material and a cushion material on a seat back and / or a seat cushion surface of a car seat, and a Peltier element is connected to the graphite sheet and heated. A seat characterized by being adapted to cool. 14. The graphite-clad structure material according to claim 1, wherein the highly-oriented graphite sheet is in the form of a strip and is housed in a pocket formed between the polymer protective sheets and is flexible. The seat according to claim 13, which is provided. 15. A flexible high-orientation graphite sheet is arranged around the upper half on which the head is placed, and a cooling / heating source such as a Peltier element is connected to it so that the head can be heated / cooled. Cool and warm pillow. 16. The graphite-clad structure material according to claim 1, wherein the highly-oriented graphite sheet is in the form of a strip, is housed in a pocket formed between the polymer protective sheets, and is flexible. The cooling and heating pillow according to claim 15, which is present. 17. A shoe characterized by arranging a flexible highly-oriented graphite sheet on the inner surface of the shoe and providing a cooling / heating source pocket to connect with the graphite sheet to cool / heat the inside of the shoe. 18. The graphite clad structural material G according to claim 1, wherein the highly oriented graphite sheet is in the form of a strip, is housed in a pocket formed between the polymer protective sheets, and is flexible, or. The shoe according to claim 1, wherein